///

### Examples of Previous Steps Strategies { #examples-of-previous-steps-strategies }

This will **depend heavily** on the way you **deploy your system**, and it would probably be connected to the way you start programs, handling restarts, etc.

Here are some possible ideas:

* An "Init Container" in Kubernetes that runs before your app container
* A bash script that runs the previous steps and then starts your application

        if (n != HEADER_LENGTH) {
            if (n == -1) {
                return -1;
            }
            throw new IOException("unexpected EOF reading netbios session header");
        }
        return buffer[bufferIndex] & 0xFF;
    }

    int type, length;

    /**
     * Writes the packet to the specified byte array in wire format.
     *

Sie können jedoch direkt eine `JSONResponse` von Ihren *Pfadoperationen* zurückgeben.

Das kann beispielsweise nützlich sein, um benutzerdefinierte Header oder Cookies zurückzugeben.

## Eine `Response` zurückgeben { #return-a-response }

Tatsächlich können Sie jede `Response` oder jede Unterklasse davon zurückgeben.

/// tip | Tipp

/// note

This is supported since FastAPI version `0.115.0`. 🤓

///

/// tip

This same technique applies to `Query`, `Cookie`, and `Header`. 😎

///

## Cookies with a Pydantic Model { #cookies-with-a-pydantic-model }

Declare the **cookie** parameters that you need in a **Pydantic model**, and then declare the parameter as `Cookie`:

 * Otherwise, at least reduce <i>explicit</i> dependencies on this type by using lambda expressions
 * or method references instead of classes, leaving your code easier to migrate in the future.
 *
 * <p>To use a reference of this type (say, named {@code guavaPredicate}) in a context where {@code
 * java.util.function.Predicate} is expected, use the method reference {@code

## Status

ACCEPTED

## Consequences

### Positive Consequences

* **Improved consistency**: The codebase has a uniform language standard
* **Easier onboarding**: New contributors have clear guidance on which spelling to use
* **Better searchability**: Finding code and documentation becomes more predictable

          + ")") : "(cache)";
      int responseCode = response.code();

      System.out.printf("%03d: %s %s%n", responseCode, url, responseSource);

      String contentType = response.header("Content-Type");
      if (responseCode != 200 || contentType == null) {
        return;
      }

      MediaType mediaType = MediaType.parse(contentType);

如果您有一组相关的 **cookie**，您可以创建一个 **Pydantic 模型**来声明它们。🍪

这将允许您在**多个地方**能够**重用模型**，并且可以一次性声明所有参数的验证方式和元数据。😎

/// note

自 FastAPI 版本 `0.115.0` 起支持此功能。🤓

///

/// tip

此技术同样适用于 `Query` 、 `Cookie` 和 `Header` 。😎

///

## 带有 Pydantic 模型的 Cookie

在 **Pydantic** 模型中声明所需的 **cookie** 参数，然后将参数声明为 `Cookie` ：

{* ../../docs_src/cookie_param_models/tutorial001_an_py310.py hl[9:12,16] *}

 * natural ordering or by a supplied comparator. Note that iterations across the columns keys for a
 * single row key may or may not be ordered, depending on the implementation. When rows and columns
 * are both sorted, it's easier to use the {@link TreeBasedTable} subclass.
 *
 * <p>The {@link #rowKeySet} method returns a {@link SortedSet} and the {@link #rowMap} method

        val request = HttpRequest.newBuilder()
            .uri(URI(uri))
            .apply {
                if (githubToken.isPresent) {
                    header("Authorization", "token ${githubToken.get()}")
                }
            }
            .build()
        val response = HttpClient.newHttpClient().send(request, HttpResponse.BodyHandlers.ofString())